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Repetitive exposures to a surrogate nipple providing nutritive and non-nutritive fluids: effects on suckling behavior of the newborn rat.

Authors
  • Petrov, Evgeniy S1
  • Nizhnikov, Michael E
  • Kozlov, Andrey P
  • Varlinskaya, Elena I
  • Kramskaya, Tatiana A
  • Spear, Norman E
  • 1 Department of Psychology, Center for Developmental Psychobiology, Binghamton University-SUNY, Box 6000, Binghamton, NY 13902-6000, USA.
Type
Published Article
Journal
Appetite
Publication Date
October 2004
Volume
43
Issue
2
Pages
185–194
Identifiers
PMID: 15458805
Source
Medline
License
Unknown

Abstract

Responsiveness to a surrogate nipple providing water, 0.1% saccharin, 10% sucrose, pedialyte, or milk was tested in naïve-to-suckling newborn rats during six 10-min exposures, one every 1.5 h over a 7.5 h period. Across a succession of exposures, newborn rats repeatedly attached to and ingested milk from a surrogate nipple, yielding significant body weight gain and increased concentration of blood plasma glucose. Initially, pups ingested considerable amounts of saccharin and sucrose, but then dramatically decreased their consumption of these fluids across the experimental sessions. Intake of milk was significantly higher than that of all other substances. Blood glucose concentration in pups treated with water, saccharin, sucrose, and pedialyte did not differ significantly from that of non-treated pups. The present data suggest a potential contribution of a fluid's palatability and nutritive value in the persistence and efficacy of diet intake for neonatal rats in the context of suckling behavior.

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